I've been using channel 6 without problem for a month with laptops. It seems everytime I change something on the Orinoco box it changes it's channel. I then have to adjust the SMC access point. Luckily, all my other clients are able to automatically determine the channel.

I am sure there is a hidden setting where you can force the channel, but believe me when I say there is almost no documentation.
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-Rob Riccardelli
80GB 16MB MK2 090000736